Type-writing machine.



A. G. F. KUROWSKI. TYPE WRITING MACHINE. APPLICATION FILED JUNE 27.1913.

Patente Apr. 4, 1916.

'2 SHEETS-SHEET I.

A. e. F KUROWSKI. i TYPE WRITING MACHINE.

APPLICATION FILED IUNE 2T. l9\3- Patented Apr. 1, 1916.

2 SHEETSSHEIET 2.

, INVENTOR: WWW

ALFRED G. F. KUROWSKI, OF NEW YQB-K, N. Y., ASSIGNOR T0 UNDERWOOD TYPE- WRITER COMPANY, OFNEVT YORK, Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

malted Apr. 4, 191a.

flriginal application fi1ed .Tanuary 9, 191$, Serial No. 670,136. Divided and this application filed June 27,

1913. Seriallto.778,008.

To alien/tom it may concern:

Be it known that I, ALFR D G. Fl K nows tr, a citizen of the United States, residing in Brooklyn borouglnin the county 'ofKings, city and State of New York, have invented certain new and useful "Improve ments in ly 'ie-VVriting Machines, of which the following is. specification.

This invention relates to typewriting machines, iii which. a relative shifting movement is effected between the types and the platen to enable .either lower case or capital letters to be written, and particularly to those machines in which the platen remains stationary while the type-bars are shifted up and down.

This application is a division of my copending application Serial Number 670,136,

filed January 9, 1912 which has now matured into. Patent No. 1,144,766, June 29, 1915.

An object of the invention is to provide improyed means for shifting the type-bar segment. or carrying frame, which shall be simple inv :onstruction and accurate, in operation and which will securely lock sai'd segment 'or frame in both upper and lower case positions.

Another feature of the invention resides in the 1 improved anti-friction means for guiding the type-bar frame in its vertical movements.

The segment which carries the type-bars is mounted on a frame shiftable to upper and lower case positions-by means of shift key levers, each of which has a hook or pro jection extending over a wrist pin on a rock arm, said rock arms being upon a rock shaft extending across the machine beneath the typo-bar segment. On said rock shaft are arms having cam slots in which work wrists carried by the segment frame, said slots being shaped to give an up-and-down niovement to the segment frame when the shaft is rised. the slots also having dwell portions to lock the segment frame in its raised and lowered positions. Said frame is guided between vertical plates adjustable to- Ward and from the frame to take up play; anti-friction rollers. being interposed. between said plates and said frame.

Between the type-bars and key-opei.'ated bell cranks on the machine frame are interposed inditidied/slides having pin-rand slot connections with the type-bars, and also having pin-and slot connections with the Other features and advantages will appear hereinafter.

In the accompanying drawings, Figure 1 is a sectional side elevation of a type-bar and connected parts in, printing position,

the shiftable segment being in its lower case position. Fig. 2 is asectional side elevation taken about midway from front to rear, of an Underwood typewriting machine, modified in accordance with the present improvements,'the parts being shown in their normal position of rest. Fig. 3 is a View simi lar to Fig.1, but showing the parts shifted for writing capitals. Fig. 4 is a fragmentary view of one of the slidable portions of the type-bar segment. Fig. 5 is a sectional front elevation view of the type-bars, typebar segment, andeonnected parts. Fig. 6 is a side elevation View of one of the guides and roller bearings for the shiftable typebar segment. Fig. 7 is a perspective View of a type-bar and the slide connecting it to a bell crank. Fig. 8 is a sectional view showing a leg of the segment frame, a guide fulcrum rod 2 and guided in radial slots 3' in .a segment 4 tostrike upwardly and rearwardly against the front side of a platen 5. The type-bars normally rest upon a pad 6 supported by a basket 7 on rods 8 extending forwardly from the segment 4. Each type-bar carries a lower case type 9 and a capital type 10. The type-bar segment is each mounted on the forward end of a lever 12 which has an arm or hook 13 to extend over a wrist 14 on a crank arm 15 projecting forward from a horizontal rock shaft 16, whereby the shaft 16 is rocked when the shifted upward by means of shift keys 11, I

shift key is depressed. The shaft 16 ex tends across the machine beneath the typebar segment, and is journaled at its ends in lugs 1? (Fig. 5) on the machine frame.

The rockshat't 16 carries a pair of arms 18 near its cnis. said arms being provided with cam slots 23 to receive the wrists 19 projecting from legs 20 of the type-bar segment frame 21, for shifting the type-bars to upper and lower case positions. The segment at is secured to the frame 21 by screws 22. The cam slots are of such shape that when the arms 18 are swung forward by the depression of either shift key, the wrists 19 will be cammcd upward, thereby shifting the type-bin segment from lower to upper case positimn As seen in Fig. 1, the wrists 1S) normally occupy dwell portions 24 in the forward ends of the slots to lock the segment against upward movement. the portion 24 of the slot being substantially concentric with the shaft 16. The opposite end of each cam slot also comprises a dwell portion 25 substantially concentric with the shaft 16 so that the type- ,bar segment is locked in. its upper case position, as shown in Fig. 3. The dwell portions form a positive means for preventing any shake or movement of the type-bar segment while in either upper or lower case position.

On the machine frame are stop lugs 26 in the path of upper and lower stops. 2? and 28 secured to the segment frame 21. The lugs 26 are preferably secured to the frame by means of screws 262 in the slots 26]. formed in said lugs. The segment frame guided by pairs of anti-friction rolls 39, each pair comprising an upper and a lower roll journaled in a vertical carriage 30 moving with the segment and occupying vertical grooves 31 and 32, the grooves 31 being formed in the outer sides of the legs 20 and the grooves 32 formed in the inner sides of: a pair of plates 33 adj ustably secured to the machine frame for taking up play, and permitting the lateral adjustment of the segment frame.

Each groove has converging walls 3- (see Fig. 8), and the ends of the rolls 29 are beveled or coned to fit these converging walls.

Each plate has a. vertical tongue 35 to lit in a groove 36 formed in a part 37 of the framework of the typewriter, thus firmly supporting and guiding the plate and permitting it to be adjusted to take up play in the roller hearings. Each plate 3?) is adjusted by means of screws 38 threaded through the frame 37 and bearing against the plate The plate is securely held in adjusted position by screws 39 extending through the machine frame 37, and threaded into plate 33. the screws 39 being set up to clamp the ,plate 33 against the adjusting screws 38 after the plate 33 has been adjusted.

Each carriage 30 to which the rolls are journalcd by pintles 40 has a horr tal projection 41 at its upper end to rest i the top of the plate 33 and support said carriage in its normal position. Each carriageI is movable upward or downward as thescg ment rises or falls. Upon the shaft 16 is a coiled spring -12 which partly counterbalances the weight of the segment and typebars, said segment bemgreturned by gravity The from upper to lower case position. spring 42 is secured at one end of the machine frame, and at its opposite end to an adjustim sleeve 42 on the shaft 16', whereby the tension of the spring may be regulated. A. return spring 43 may be connected to one of the arms 18 to assist in returning said arm and the rock shaft 16 to lower case position, and to assist. in lowering the type bar segment. 1

The type-operating keys Hare mounted on levers 45 similar in form totthe levers l9. and fulcrumed on the same bar' -16, the levers and having returning springs l7. Upon the key levers 45 are wrists 4:8 to engage slots 49 in the horizontal arms 50 of hell cranks 5L. The bell cranks have upright arms provided with wrists to engage slots extending up and down in arms 5% provided on slides which form connections between. thebell cranks and t vpe-ba1's,-for swinging the latter about their fulcrum 2. The slides 55 have wrists 5G to engage cam slots 57 in the type-bars 1, so that when a slide is moved forwardly by its bell crank, a. typebar is swung up to printing position. The slides 55 occupy recesses or enlargements 59 in the radial type-bar slots 3, and lieside by side with thetype-bar hubs in the enlarged portions of the slots, said slots therefore serving to guide the slides as well as the type-bars. The arms 54 of slides 55 extend beyond the recesses 59 and are bent to be parallel to or substantially in line with the upper arms of their respective bell cranks 51 the horizontal arms of which bell cranks are in turn pa 'allel to or substantially in the same planes as the key levers, so that arms 5 and the hey levers are practically in the same planes. The guides in a sense, form adjustable extensions of the up: per ends of the bell cranks.

In Fig. l is shown the conformation of the lower portion of the segment 4, and the manner in which the type-bar fulcrum rod 2 is mounted. as well as the front and rear curved rods 61 and upon which the slides are guided, all of said rods being seated. in slots in the segment, the inner ends of the slots being enlarged to fit the rods and re tain them in place'. The slides 55 are provided with slots 62 and 63 throughwhich the guide rods 61 and 60 extend, said slots being preferably formed on a curve substantially concentric with the fulcrum 62f: of the bell cranks 51. whereby the slide 55 is given acurvilincar motion when actuatedby the will have the desired action upon the type bar. That is, the direction of movement of y the wrist 56 is first approximately in the direction of the slot 57, so that the type-bar is started slowly in motion, and then transversely of the slot, so that the type-bar is speeded as it approaches the platen.

Variations may be resorted to within the scope of the invention, and portions of the improvenn-mts may be used Without others.

Having thus described myv invention, I claim:

1. The combination with an up-and-down shiftable type segment, guiding legs depending from said segment, ways on the machine on which ways said legs are guided straight up and down, of a rock shaft, extending across the machine, a key to operate said rock shaft, arms on saidrock shaft, connections between said key and said rockshaft, and wrists on said guiding legs operable by said armsto shift the segment straight up and down, said arms having cam slots engaged by said wrists, and formed both to lock the segment against movement in either direction from normal position and to shift the same. 4

2. The combination with an up-aml-down shiftable type segment, downwardly projecting legs on said segment, ways on the machine frame,means on said logs for fittin said wa s, av rock shaft extendin across-the machine, a key, connections between said key and said rock-shaft to operate said rock shaft, arms on said rock shaft, wrists on said. segment operable by said arms to shift the segment straight up and down, said arms having cam slots engaged by said wrists both to lock the seg-' ment in normal position and to shift the same, and also to lock the segment in shifted position. and adjust blo stops for said segment. i

3 The combination with an up-and-down shiftable type segment, depending legs on said segmenhgroovcs on the frame, means on said logs engaging said grooves, a rock shaft extending across the machine, of a key, connections between said key and said rock-shaft to,o crate said rock shaft, arms on said rock shaft, wrists on said segn'ient operable by said arms to shift the segmentstraight up and down, said arms having cam slots engaged by said'wrists l'iotli-to"-'-' lock the segment in normal position tllHl' to shift the same, and alsoto lock the segment in shifted position, a. returning spring for said arms, and a. coiinter-balancing spring for said segment.

-'l-. A shiftablc typc bar segment having on its opposite edges guiding grooves, guiding members on the framework of theinachine lniving corresponding guiding grooves, said grooves extending up and down, and each groove havingconverging guide walls.

the grooves cooperating to form races, upper and lower rolls in each race having parallel axes between the grooves of said seg m'ent and those of said guiding members, each roll having bearing faces at its opposite segment and a guiding member, and carri ages or spacers to whichsaid rolls are pivoted, and which are movable up and down to said grooves extending up and down, and

each groove having converging guide walls, the grooves cooperating to form races,,upper and lower rolls in each race, said rolls having their axes perpendicular to the plane of the segn'ient and between the grooves of said segment and those of said guiding members, said rolls having bearing faces] spanning the space between the segment and a guiding member, and carriages or spacers to which said rolls are pivoted; one

of'said guiding men'ibers having a platejor member ad ustable toward the segment to take up play of the rolls.

(3. A shiftable' type bar segment having on its opposite edges guiding grooves, guiding members on the framework of the machine having corresponding guiding grooves, said grooves extending up and down, and each groove having converging guide walls, the grooves coiiperating to form races, upper and. lower rolls in each race. carriages or spacers to which said rolls are pivoted, one of said guiding members having a plate or member adjustable toward the segment to take up play of the rolls, said adjustable plate having a vertical tongue, and the framework member having a corresponding groove, and oppositely acting screws for both adjusting the plate and securing it where adjusted,

7. in a. type-writing machine, the combiends each spanning the space between the nation with a type bar segment shift-able to upper and lower rase positions guiding grooves therefor, means on said segment engaging said grooves of a rock shaft, an arm on said rock shaft having, a cam slot therein, a wrist on the scgi'nent and working i-n sa-id slot, a key to rock said shaftand connections from said key, to said rock-Q shaft, said slot terminating in dwell por- Lions uh. antially concentric with the rock shaft that different distances from the rock shaft, and having an intermediate cam portion to shift the segment, said dwellfportions each forn'iing a lock to prevent either up or down movement ofthe type bar segment while the said wrist is in a dwell portion. 4

In a typewriting machine, the combination with a vertically shiftable type bar segment, of a shift key lever, a rock shaft, a rock arm on said shaft, a projection on said lever extending over said rock arm, a second arm .(-n said shaft formed with a cam slot, and a wrist on the segment Working in said slot.

9. In a typoivriting machine, the combination with a machine frame and a ty ecarrying frame shiftable vertically to upper and lower case positions, of a bearing plate having a connection with the machine frame comprising a vertical tongue and groove, means to adjust said bearing plate laterally and hold it in adjusted position, and bearing rollers between said plate and the type-carrying frame.

10. In a typewriting machine, the combination with a machine frame and a typerarrying frame shiftable vertically to upper and lower case positions, of a bearing plate having a connection with the machine frame comprising a vertical. tongue and groove, means to adjust said bearing plate laterally and hold it in adjusted position, bearing rollers between said plate and the typecarrying frame, said means comprising screws threaded in the machine frame and bearing against the adjusting plate, and screws extending loosely through the machine frame and. threaded into said adjusting plate. I

11.. lira ty 'iewriting machine, the combination of a shiftable type bar segment frame having on its outer edges vertical guiding grooves, guiding members on the machine frame having opposing guiding grooves, said grooves having converging guide walls and forming races, upper and lower rolls in said races, said rolls having forwardly and rearwardly extending horizontal axles, and carriages or spacers on which said axles are mounted.

12-. In a typewriting machine, the combi nation with a slliftable type bar segment having on its opposite edges guiding grooves, guiding members on the frame work of the machine having corresponding guiding grooves opposite said first-named grooves extending vertically, each groove having converging side walls, the grooves cooperating to form a recess, upper and lower rolls in said recess, each having a forwardly and rearwardly extending axis, the length of said rolls being greater than their diameter, and each roll formed at its outer end with beveled or inclined bearing surfaces spanning the spaces between the segment and guiding member and-bearing on said converging side walls, and spacing carriages to which said rolls are pivoted.

ALFRED G. F. KUROWSKI. Witnesses:

Trros I-I. Irons, F. E. ALEXANDER. 

